\documentclass[a4paper]{article}
% Português
\usepackage[T1]{fontenc}
\usepackage[utf8x]{inputenc}
\usepackage{lipsum}
\usepackage[portuges]{babel}
%
\title{Separar com \texttt{input}}
\author{Francisco Coelho}
%
\begin{document}
    \maketitle
    \tableofcontents
    \input{sec01}
    % \input{sec02}
\end{document}